Say what you'd most like to hear...
Sometimes we just need to hear a certain phrase for us to feel comforted and happy.
Say something to yourself that you'd most like to hear right now. 

"You are going to be okay. Eventually, this pain will heal."
"It wasn't your fault."
You matter
You're a really good friend.
I want to hear that there's someone there for me.
You're not alone in your goals, dreams, mistakes, wishes, experiences. If you've experienced it, likely someone else has, and don't forget to reach out to others so you don't have to feel so alone in these aspects. This world is too lonely.
"You're doing a good job! I know how hard things have been, and how tired you are right now. What can I do to help you? I support you!"
I'd like to hear that I'm enough and someone will finally like me for who I am
I want to hear Im useful or loved and or wanted.
You did a good job, a very good job. The things that went wrong were not your fault. You matter, in fact you are precious. You are not alone.
"You're doing the best you can, under the circumstances you're in right now. That's all anyone could ask of you. You're doing us proud."